One day an idiot wakes up and decides to spoil the way system-tray works since Age of Stone. Result? Well, you won't find your app anymore there. In this case, the idiot I'm talking about is the creator of Unity Ubuntu GUI. If you Google around for a while, you'll find a lot of disappointed people not finding anymore their favorite apps in system tray.

Luckily, crazyness hasn't got over GUI creators, and you can add your app to systray-whitelist using the following method.

First, get your current settings for systray-whitelist:gsettings get com.canonical.Unity.Panel systray-whitelist